Skip to main content
×
Home
    • Aa
    • Aa
  • Get access
    Check if you have access via personal or institutional login
  • Cited by 43
  • Cited by
    This article has been cited by the following publications. This list is generated based on data provided by CrossRef.

    Ireland, Peter J. Bragg, Andrew D. and Collins, Lance R. 2016. The effect of Reynolds number on inertial particle dynamics in isotropic turbulence. Part 2. Simulations with gravitational effects. Journal of Fluid Mechanics, Vol. 796, p. 659.


    Rosa, Bogdan Parishani, Hossein Ayala, Orlando and Wang, Lian-Ping 2016. Settling velocity of small inertial particles in homogeneous isotropic turbulence from high-resolution DNS. International Journal of Multiphase Flow, Vol. 83, p. 217.


    Zhang, Qingqing Liu, Han Ma, Zongqiang and Xiao, Zuoli 2016. Preferential concentration of heavy particles in compressible isotropic turbulence. Physics of Fluids, Vol. 28, Issue. 5, p. 055104.


    Bergougnoux, Laurence Bouchet, Gilles Lopez, Diego and Guazzelli, Élisabeth 2014. The motion of solid spherical particles falling in a cellular flow field at low Stokes number. Physics of Fluids, Vol. 26, Issue. 9, p. 093302.


    Chou, Yi-Ju Wu, Fu-Chun and Shih, Wu-Rong 2014. Toward numerical modeling of fine particle suspension using a two-way coupled Euler–Euler model. Part 1: Theoretical formulation and implications. International Journal of Multiphase Flow, Vol. 64, p. 35.


    Pedel, Julien Thornock, Jeremy N. Smith, Sean T. and Smith, Philip J. 2014. Large eddy simulation of polydisperse particles in turbulent coaxial jets using the direct quadrature method of moments. International Journal of Multiphase Flow, Vol. 63, p. 23.


    Dejoan, A. and Monchaux, R. 2013. Preferential concentration and settling of heavy particles in homogeneous turbulence. Physics of Fluids, Vol. 25, Issue. 1, p. 013301.


    Kunnen, R.P.J. Siewert, C. Meinke, M. Schröder, W. and Beheng, K.D. 2013. Numerically determined geometric collision kernels in spatially evolving isotropic turbulence relevant for droplets in clouds. Atmospheric Research, Vol. 127, p. 8.


    Macías, Diego Rodríguez-Santana, Ángel Ramírez-Romero, Eduardo Bruno, Miguel Pelegrí, Josep L. Sangrà, Pablo Aguiar-González, Borja and García, Carlos M. 2013. Turbulence as a driver for vertical plankton distribution in the subsurface upper ocean. Scientia Marina, Vol. 77, Issue. 4, p. 541.


    Nicolleau, F. C. G. A. Sung, K.-S. and Vassilicos, J. C. 2013. Vertical Motions of Heavy Inertial Particles Smaller than the Smallest Scale of the Turbulence in Strongly Stratified Turbulence. Flow, Turbulence and Combustion, Vol. 91, Issue. 1, p. 79.


    Pathak, Manabendra and Khan, Mohd. Kaleem 2013. Inter-phase slip velocity and turbulence characteristics of micro particles in an obstructed two-phase flow. Environmental Fluid Mechanics, Vol. 13, Issue. 4, p. 371.


    AKAHORI, Ryosuke MATSUO, Yosuke and YOSHIMURA, Chihiro 2012. FLOW STRUCTURES AND SUSPENDED SEDIMENT TRANSPORT AROUND SUBMERGED SPUR-DIKES. Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering), Vol. 68, Issue. 4, p. I_1147.


    Ireland, Peter J. and Collins, Lance R. 2012. Direct numerical simulation of inertial particle entrainment in a shearless mixing layer. Journal of Fluid Mechanics, Vol. 704, p. 301.


    Monchaux, Romain Bourgoin, Mickael and Cartellier, Alain 2012. Analyzing preferential concentration and clustering of inertial particles in turbulence. International Journal of Multiphase Flow, Vol. 40, p. 1.


    Pedel, Julien Thornock, Jeremy N. and Smith, Philip J. 2012. Large Eddy Simulation of Pulverized Coal Jet Flame Ignition Using the Direct Quadrature Method of Moments. Energy & Fuels, p. 121030145900005.


    Romain, Monchaux 2012. Measuring concentration with Voronoï diagrams: the study of possible biases. New Journal of Physics, Vol. 14, Issue. 9, p. 095013.


    Dejoan, Anne 2011. DNS experiments on the settling of heavy particles in homogeneous turbulence: two-way coupling and Reynolds number effects. Journal of Physics: Conference Series, Vol. 333, p. 012006.


    Sabban, Lilach and van Hout, René 2011. Measurements of pollen grain dispersal in still air and stationary, near homogeneous, isotropic turbulence. Journal of Aerosol Science, Vol. 42, Issue. 12, p. 867.


    Balachandar, S. and Eaton, John K. 2010. Turbulent Dispersed Multiphase Flow. Annual Review of Fluid Mechanics, Vol. 42, Issue. 1, p. 111.


    Monchaux, R. Bourgoin, M. and Cartellier, A. 2010. Preferential concentration of heavy particles: A Voronoï analysis. Physics of Fluids, Vol. 22, Issue. 10, p. 103304.


    ×
  • Journal of Fluid Mechanics, Volume 371
  • September 1998, pp. 179-205

The role of the turbulent scales in the settling velocity of heavy particles in homogeneous isotropic turbulence

  • C. Y. YANG (a1) and U. LEI (a1)
  • DOI: http://dx.doi.org/10.1017/S0022112098002328
  • Published online: 01 September 1998
Abstract

The average settling velocity of heavy particles under a body force field is studied numerically in stationary homogeneous isotropic turbulent flows generated by the direct numerical simulation and the large eddy simulation of the continuity and Navier–Stokes equations. The flow fields corresponding to different selected ranges of turbulent scales are obtained by filtering the results of the direct numerical simulation, and employed for calculating the particle motion. Wang & Maxey (1993) showed that as a consequence of the particle accumulation in the low vorticity region and the preferential sweeping phenomenon, the average settling rate in turbulence is greater than that in still fluid. In the present study, the phenomenon of particle accumulation in the low vorticity region is found to be controlled mainly by the small scales with wavenumber kω corresponding to the maximum of the dissipation (vorticity) spectrum. However, the increase of the average settling rate, 〈ΔvS〉, also depends strongly on the large energetic eddies. The small eddies with wavenumber greater than 2.5kω have essentially no effect on the particle accumulation and the average settling velocity. The large eddy simulation is thus adequate for the present study provided the smallest resolved scale is greater than 1/(2.5kω). Detailed calculations show that 〈ΔvS〉 is maximized and is of order u′/10 when τpk≈1 and vd/u′≈0.5 for Rλ=22.6–153, where τp is the particle's relaxation time, τk is the Kolmogorov timescale, vd is the settling rate in still fluid, u′ is the root mean square of the velocity fluctuation, and Rλ is the Reynolds number based on the Taylor microscale.

Copyright
Corresponding author
Author to whom the correspondence should be addressed.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of Fluid Mechanics
  • ISSN: 0022-1120
  • EISSN: 1469-7645
  • URL: /core/journals/journal-of-fluid-mechanics
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×
MathJax